Suction pumps having suction tubes with peripheral openings



SUCTION PUMPS HAVING SUCTION TUBES WITH PERIPHERAL OPENINGS Filed Feb 26 .1962

FIG.

FIG.Z

INVEV TOR.

United States Patent 3,135,221 SUCTION PUMPS HAVING SUCTiON TUBES WITH PERIPHERAL. OPENINGS Georg S. Mittelstaedt, 274 73rd St., Brooklyn, N.Y. Filed Feb. 26, 1962, Ser. No. 175,594 7 Claims. ((11. 103-262) This invention relates to suction means,'including suction pumps, and relates particularly to the specific construction of the suction device, that is, theconduit or flow tube and the suction tube associated therewith. The device is capable of independent use, separate and apart from any specific use or any specific source of fluid through the conduit, and may be used wherever suction devices are employed. For instance, the suction device may beused in connection with jet engines and other internal combustion devices, it may be used in combination withtany intake or exhaust means, with spray, draining, and draft devices, with aeration devices and other combining devices, to drive turbines or other apparatus, and whenever'suction flow may be utilized.

Objects of this invention are: to provide a suction pump in connection with fiuid' flow, to increase the efliciency of suction devices, to improve suction tubes, to improve suction pumps, toproduce suction flow, to augment suction "flow, to augment flow in the conduit downstream of the suction pump, to increase the effective total momentum of mm, to increase the effective total momentum of fluid discharged in'unit time, to increase thrust, to increase power, to provide a suction pump in connection with suction flow, to utilize the suction flow to secure a cooling 'eflect, to provide a cool runningturbine, to drive a turbine, simplicity of construction, installation and maintenance, and low cost.

These and other objects will become apparent in the description below, in which characters ofreference refer to like-named parts in the drawing.

Thedr-awing'shows sectional views illustrating the invention, but the invention is not limited to the particular examples illustrated.

FIGURE 1 is a longitudinal sectional view of a conduit "and a suction tube extending partly across the conduit,

showing anembodiment of this invention.

1 FIGURE Zisa-longitudinal sectional view of a conduit and a suction tube extending across the conduit, and a suction tube extending across the suction tube.

FIGURE 3 is a transverse sectional view oftthe device, taken on the line 3'3"of FIGUREZ.

"Referring in detail-to the drawing, the numeral 10 indicates a conduit or flow tube, and 11 indicates a suction tube with a peripheral opening 14 and a transverse barrier 12 beyond the opening. The suction tube extends with all sides about three quarters across the flow tube at right angles to the axis thereof. The numeral 13 indicates welds or other fastening means, and the arrows in the tubes indicate the direction of flow. The flow tube and suction tube are the straight line wall type. The suction tube diverges and then converges transversally, and a constriction of flow is produced which increases to the diameter of the suction tube, and then decreases. Velocity increases and decreases in proportion to constriction of flow. The suction opening 14 preferably begins immediately downstream of the greatest constriction of flow and extends toward the rear portion of the suction tube. Since pressure is reduced accompanying increase of velocity, a low pressure area is produced, and air or other fluid is drawn through the suction tube 11 into the flow tube 10. The opening 14 may be formed by cutting away or otherwise eliminating all or part of the suction tube wall downstream of the greatest constriction of flow. The suction tube may also be cast or otherwise made with corresponding openings. The openings may be of any character, shape or form, and in'the text and claims, by opening is also meant plural openings, including slits, perforations, pores, or any other type opening. Thewall portion of the suction tube'toward the-flow may be streamlined, or be equipped with a fairing, and this is partof this invention.

Suction increases with increased extension of the sue.-

. tion tube across the flow tube, and FIGURE 2 shows a suction tube 15 extending all the way across the conduit 10. The numeral '17 indicates the peripheral opening in the suction tube, and16 denotes the transverse barrier beyond the opening. In this preferred example of FIG- URE 2, velocity increases to the diameter of the suction tube and then decreases. A low pressure area is produced, and air orother fluid is drawn through the suction tube 15 into the flow tube 10. The numeral'21 indicates a suction tube of the straight line wall type extending across the suction tube 15 at right angles to the-axis thereof. The numeral 23 indicates a peripheral opening in'the tube 21, and 22 indicates a barrier across the tube beyond the peripheral opening. In this part of the invention, the suction tube 15 acts in part as flow tube-in relation to suction tube 21. A low pressure area is produced, and

fluid is drawn through the tube 21 into the tube 15. Tubes 15 and 21 may be cast or made integrally.

FIGURE 3 is-a transverse sectional view taken on the line 3-3 of FIGURE Z. The numeral 10 indicates the conduit 15 the principal suction tube, and 16 the transverse barrier of .tube .15. The numeral '17 indicates 'the opening in the peripheral wall of the suction tube 15 tubes, and this is part of this invention.

The suction tube may 'befastened to the conduitby any suitable means such as welding, soldering, bolting, "cementing, screwing, .etc.; or a fitting may be made comprising a representative portion of the conduitand the 7 described suction tube extending thereinto,the fitting being inserted in the conduit or attached thereto by *any suitable means. Such meansinclude unions or other coupling means, cementing, soldering, welding, etc. The

broken lines 19 and 20 in FIGURE 2 indicate the insertion of the fitting in the conduit.

Examples of practical applications of the inventionare:

(1) Drainage pumps, where the defined suction tube of the device communicates with useless water.

(2) Aeration devices, where the suction tube communicates with air or other gas,

.(3) Mixers, where the suction tube communicates with selective mixing fluid.

(4) Sprayers, where the suction pump and a suitable nozzle are disposed at the end of the hose or conduit, and where the defined suction tube communicates with fluid material used in the spray.

(5) Exhaust aeration pumps for piston type combustion engines, where the device is inserted in the exhaust line, or attached to the end of the tail pipe, and where the defined suction tube communicates with air.

(6) Suction pumps for jet engines, where the defined suction tube may extend (a) across the air intake duct, (b) across the burner or ducted burner preferably at a point where high velocity has been reached, (c) across the exhaust tube of a combustion chamber, (d) across the exhaust nozzle.

(7) Suction pump according to Example 6, where the suction tube is conected with turbine means, the tur- Suction effect augmenters may be used in connection withthe suction tubes. The augmenters usually comprise enlargedmouths at the outer end of the suction tubes.

In the text andclairns, by tubes of the straight line .wall type is meant this type at the aspiration point; by tube is also meant duct, channel, passage; by suction tube is meant any tube which conveys suction flow, also in part; by conduit or flowtube is also meant channel,

duct, passage, ducted burner, exhaust tube, exhaust nozzle;

by fluid is meant any substance which is capable of flowing, as a liquid, a gas, or readily movable solids; by upstream side or downstream side of the suction tube is meant in relation to flow through the flow tube.

The principles involved in this invention may be applied to all fields of fluid flow, as related to suction.

Changes in form and construction may be made without departing from the spirit or scope of the invention.

I claim:

1.,In suction pump means comprising a flow tube and a suction tube extending partly across the flow tube and .producing an increasing-decreasing constriction of flow therein, the suction tube having its end within the flow tube transversely closed, a peripheral opening in the suction tube beginning on one side of the suction tube facing the flow tube immediately downstream of the greatest constriction of flow, extending around the downstream ,portion of the suction tube and ending on the opposite sideof the suction tube facing the flow tube immediately downstream 'of the greatest constriction of flow.

'2. Insuction pump means according to claim 1, the flow tube being straight line wall type.

3. In suction pump means comprising a flow tube and a suction tube extending at least partly across the flow tube and producing an increasing-decreasing constriction of flow therein, the suction tube having its end'within the flow tube transversely closed, a perimetric opening 5. In suction pump means comprising a flow tube and a suction tube extending across the flow tube and producing an increasing-decreasing constriction of flow therein, the suction tube having its end closed transversely, a perimetric opening in the suction tube beginning on one side of the suction tube facing the flow tube immediately downstream of the greatest constriction of flow, extending around the downstream portion ofthe suction tube and endingon the opposite side of the suction tube facing the flow tube immediately downstream of the greatest constriction of flow. a

6. In a suction device comprising a flow tube and a rimary suction tube with a transversely closed end and a peripheral opening extending at least partly across the flow tube and'producing an increasing-decreasing constriction of flow therein, a secondary suction tube extending into said primary suction tube, said peripheral opening in the primary suction tube beginning on one side of the suction tube facing the flow tube immediately downstream of the greatest constriction of flow, extending around the downstream portion of the suction tube and ending on the opposite side facing the flow tube immediately downstream of the greatest constriction of flow.

7. In a suction device comprising a flow tube and a primary suction tube extending into the flow tube, a secondary suction tube with a transversely closed end and 'a peripheral opening extending at least partly across the primary suction tube and producing an increasing-decreasing constriction of flow therein, said peripheral opening in the secondary suction tube beginning on one side of the suction tube facing the Wall of the primary suction tube immediately downstream of the greatest constriction of flow, extending around the downstream portion of the suction tube andending on the opposite side of the secondary suction tube facing the primary suction tube immediately downstream of the greatest constriction of in the suction tube beginning on one side of the suction tube facing the flow tube at the greatest constriction of flow, extending around the downstream portion of the -suction tube and ending on the opposite side facing the flow tube at the greatest constriction of flow.

4. In suction pump means according to claim 3, the flow tubebeing the straight line wall type.

References Cited in the file of this patent UNITED STATES PATENTS 

1. IN SUCTION PUMP MEANS COMPRISING A FLOW TUBE AND A SUCTION TUBE EXTENDING PARTLY ACROSS THE FLOW TUBE AND PRODUCING AN INCREASING-DECREASING CONSTRICTION OF FLOW THEREIN, THE SUCTION TUBE HAVING ITS END WITHIN THE FLOW TUBE TRANSVERSELY CLOSED, A PERIPHERAL OPENING IN THE SUCTION TUBE BEGINNING ON ONE SIDE OF THE SUCTION TUBE FACING THE FLOW TUBE IMMEDIATELY DOWNSTREAM OF THE GREATEST CONSTRICTION OF FLOW, EXTENDING AROUND THE DOWNSTREAM PORTION OF THE SUCTION TUBE AND ENDING ON THE OPPOSITE SIDE OF THE SUCTION TUBE FACING THE FLOW TUBE IMMEDIATELY DOWNSTREAM OF THE GREATEST CONSTRICTION OF FLOW. 